#pragma once
#include <functional>
#include <string>
#include <signal.h>
#include "Log.hpp"
#include "Socket.hpp"

using func_t = std::function<std::string(std::string &package)>;

class TcpServer
{
public:
  TcpServer(uint16_t port, func_t callback) : port_(port), callback_(callback)
  {
  }
  bool InitServer()
  {
    listensock_.Socket();
    listensock_.Bind(port_);
    listensock_.Listen();
    lg(Info, "init server .... done");
    return true;
  }
  void Start()
  {
    signal(SIGCHLD, SIG_IGN);
    signal(SIGPIPE, SIG_IGN);
    while (true)
    {
      std::string clientip;
      uint16_t clientport;
      int sockfd = listensock_.Accept(&clientip, &clientport);
      if (sockfd < 0)
        continue;
      lg(Info, "accept a new link, sockfd: %d, clientip: %s, clientport: %d", sockfd, clientip.c_str(), clientport);
      // 提供服务
      if (fork() == 0)
      {
        listensock_.Close();
        std::string inbuffer_stream;
        // 数据计算
        while (true)
        {
          char buffer[1280];
          ssize_t n = read(sockfd, buffer, sizeof(buffer));
          if (n > 0)
          {
            buffer[n] = 0;
            inbuffer_stream += buffer;

            lg(Debug, "debug:\n%s", inbuffer_stream.c_str());

            while (true)
            {
              std::string info = callback_(inbuffer_stream);
              if (info.empty())
                break;
              lg(Debug, "debug, response:\n%s", info.c_str());
              lg(Debug, "debug:\n%s", inbuffer_stream.c_str());
              write(sockfd, info.c_str(), info.size());
            }
          }
          else if (n == 0)
            break;
          else
            break;
        }

        exit(0);
      }
      close(sockfd);
    }
  }
  ~TcpServer()
  {
  }

private:
  uint16_t port_;
  Sock listensock_;
  func_t callback_;
};